In Q1'26, OXY's total operating expenses reached $245M USD, driven entirely by SG&A expenses, as R&D expenses reported no data for the period. This marks a notable decline from Q4'25's total of $203M USD, primarily due to the absence of R&D contributions. Over the period from Q2'23 to Q1'26, operating expenses exhibited a volatile yet overall downward trend, starting at $379M USD in Q2'23 and peaking at $419M USD in Q4'23 before stabilizing around $300M-$350M USD through 2024 and early 2025. R&D expenses fluctuated significantly, declining sharply from $125M USD in Q3'23 to $45M USD in Q4'25 with intermittent recoveries, while SG&A expenses remained relatively stable at $250M-$280M USD until a drop to $158M USD in Q4'25 followed by a rebound to $245M USD in Q1'26, highlighting cost management efforts amid varying business demands.